Let me start by saying I'm a long-time admirer of Anthony Gregory's writing, and I'm as surprised as he is that this has turned into a significant disagreement. Frankly, given our considerable areas of agreement, I'm having a hard time figuring out why my commentary piece ("Corporations are People? So Was Hitler") set him off.
Gregory's first objection, in "Contra Kevin Carson," is to my assertion that the profits of large corporations are disproportionately the result of state-enforced unequal exchange (monopolies, artificial property rights, entry barriers, etc.).